Looking at the frequency chart, the modal class interval is 15 cm ≤ h < 16 cm as there are 5 pieces of data in this class. ... The time it takes 20 people to run 100 m is recorded.

Continuous data can be grouped using a frequency tally. The class interval 0 ≤ \(x\) < 10 can have any values greater than or equal to 0 but less than 10 in it. This group includes anything exactly ...